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APPLICATION FILED MAR. 2B. 1918.

IN VEN TUI? Patented July 1, 1919.

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RABBLE AND CLINKER BREAKER.

APPLICATION FILED MAR. 28

Patented July 1, 1919.

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RABBLE AND CLINKERABREAKEH. APPLICATION FILE) MAR. 28. |918. 1,308,653.

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lll/111111111111 FREDERICK WILLIAM BOOKING, OF VAN BUREN, ARKANSAS.

RABBLE AND CLINKER-BREAKER.

Specification. of Letters Patent.

lPatented July 1, 1919.

Application filed-March 28, 1918. Serial No. 225,206.

To all whom it may concern Be it known that I, FREDERICK WV. Boex- INe,a citizen of the United States, residing at Van Buren, in the county ofCrawford and State of Arkansas, have inventedv a neviT and ImprovedBabble and Clinker-Breaker, of which the following is a full, clear, andexact description.

My invention relates to a rabble and clinker breaker particularlysuitable for zinc furnaces. An object of the invention is to provide anapparatus of the class described which is simple in construction and bymeans of which the grate of the furnace can be maintained Vclean ofclinkers and, in consequence, a more even feed of the charge of orethrough the furnace obtained.

Vith `the vabove and other objects in view, the. nature ofWhich will.more fully appear :as the description proceeds, the invention consistsin the novel construction, combination and arrangement of parts asherein fully described, illustrated and claimed.

In the accompanying drawings, forming part of the application, similarcharacters of reference indicate corresponding parts in all the views. Y

Figure 1 is a longitudinaldiagrammatic section through a zinc oxidvfurnace equipped with apparatus embodying my invention Y Fig. 2 is anenlarged longitudinal section through the furnace and through the rabbleand clinker breaker on line 2 2, Fig. 4;

Fig. 3 is a horizontal section on line 3 3, Fig. 2;

Y Fig. 4 is a cross section on line 4 4, Fig. 2;

Fig. 5 is a vertical section on line 5 5, Fig. 2.;

Fig. 6 is a horizontal section on line 6 6, Fig. Q; and

Fig. 7 is Fig. 2.

^ When a charge of Zinc-bearing material mixed with a reducing agent isput on what is knownas the IVetherell grate and heated, the materialforms more or less of a clinker, and on account of this formation it isimpossible to move the material mechanically through a zinc oxid furnaceduring the process of treatment. The method of handling'the charge insuch cases would be to discharge the treated material out of one end asfast as fresh charge was put in at the a. vertical section on line 7 7,

other end. 'On account of the clinkers, the rabbles, when engaging suchclinkers, have a tendency to move the entire charge ahead before thecharge has been thoroughly treated, or, in other Words, the rabbleswould push the entire charge out of the furnace at the first engagementwith it, instead of pushing or rabbling the charge through in severalinterrupted stages and, in consequence, giving time to the charge to beproperly treated.

To overcome this deficiency in the present method of treating zinc ores,the charge is allowed to vremain dormant in the furnace until thetreatment is completed. In many instances a portion of the charge istreated before the remainder. In consequence, there is a: loss of timedue to the double treatment of a single charge. After the charge hasbeen lconverted the clinkers are broken up with iron bars and raked outby hand, and another charge is then put in. It will be noted that duringthe time of cleaning out the clinkers and putting in a fresh charge a:great deal;` of time is lost, besides the amount of hard labor requiredto remove the clinkers.

To obviate the defects pointed out above, I provide a combined rabbleand clinker breaker which is adapted to automatically clean a IVetherellgrate, thereby allowing a continuous operation of the furnace. To thisend I provide a carriage which has a frame 9, preferably built ofstructural iron. An axle 10 is provided near one end of the frame, andit carries aI row of star wheels 11 each revolubly mounted on the axle.Each of said Wheels has a plurality of spokes 12 which, in turn, willbreak up the clinkers formedin the charge of the ore in the furnace. Itwill be noted that each Wheel revolves independently of the other, andto obtain a better breaking up of the clinkers the end of each spoke istapered to an edge, so that under the weight of the carriage the edgewill have a tendency to cut through the material and, therefore, breakup the clinkers formed therein. The adjacent spokes have their taperededges at right angles to one another. Vith soft ores the rear of thecarriage may be provided with ordinary wheels 1B which, in consequence,will form a rolling support for the carriage in the rear.

Positioned between the wheels 11 and 13 are the rabbles 14 disposed intwo parallel sets instaggered krelation so that t-he rabbles of the twosets will comb the surfaceof thev grate as the carriage is moved throughthe furnace. Each set of rabbles is secured to a corresponding bar 15which are mounted to turn in the frame 9 of the carriage. The sets of`rabbles being bottom heavy, nornally tend to remain in verticalposition, as shown in Fig. 2. To prevent the swinging of the bars whenthe rabbles plow through the charge on the grate, stops 16 are provided,which are in the shape of rolls, on a frame 17 which is movable relativeto the carriage frame 9. The stops 16 lie in the path of the eXtremerabbles of the sets, and when the said rabbles engage said stops thebars 15 are prevented from moving in the carriage frame.

The frame 17 rests on rollers 18 whichare allowed to float on thecarriage frame 9, the fioating motion of the rollers being limited bybrackets 19 secured to the frame 17 The movement of the frame 17 on thecarriage frame 9 is positively limited by stops 20 provided at the endsof the frame 17. By moving the frame 17 to the rear of the frame 9, therabbles are thrown at an angle, best shown in Fig. 1. In such positionsof the rabbles the carriage can be drawn to the charge end of thefurnace without dragging out the charge on the grate. The movement ofthe carriage is controlled by a flexible member 21 mounted on suitabledrums 22, and which flexible members are connected to the frame 17. Theframe 17 is prevented from ri singoff the carriage frame 9 by members Inthe posi-tion shown in Fig. 1 the rabble and clinker breaker is at thecharge end of the furnace. The frame 17 is shown withA a cam 24 locatednear the forward end of said frame, which cam is shown in operativeengagement with the ore-discharge control 25. Inother words, when thecam has engaged the discharge control 25, a certain amount Vof ore ischarged from the trough 26 into the furnace 27. The cable 21 to theright of the furnace. is then wound on its drum'22. 'Ihe winding of thecable will first move the frame 17 on the carriage frame 9. Inconsequence, there is an initial displacement of the frame 17 relativeto theoarriage frame 9 which causes the rabbles to move t0 the verticalposition, as shown in Fig. 2.

The further winding of the cable will entrainthe carriage into thefurnace and the spokes or arms 12 will be caused to travel through thecharge on the grate 28 of the furnace and break up any clinkers that mayhave formed. As the carriage progresses, therabbles begin to plow thecharge and,

rbe moved or advanced into the furnace.

therefore, replace the treated charge in the furnace by the freshlydischarged load po n view of the fact that the rabbles are preceded -by'the clinker breaker, there is no danger of the rabbles causing a bodilydischarge of the entire load of the furnace out beforey the same isproperly treated.

After the carriage has been moved through the furnace vit is dragged byturning the drum to the left. The winding of the drum will first cause amovement of the frame 17 on the carriage frame 9, thereby permitting therabbles to swingto a point so as not to move the charge rearwardly. Whenthe carriage is brought to the front and a new charge of ore is made,the cycle is repeated.

I claim:

1. In a rabble and clinker breaker, a carriage, series of rabbles on thecarriage, each series being mounted to swing in an axis transverse ofthe carriage, and means having a limited sliding movement on thecarriage Vin direction of movement of the carriage and including meansfor engaging the rabbles, whereby said rabbles may be placed intooperative or into inoperative position.

2. In a rabble and clinker breaker, a carriage, a series ofl rabbles onthe carriage, each series being mounted to swing, a frame having alimited movement on the carriage, means for propelling the carriagesecured to the frame, and means carried bysaid frame for engaging therabbles, whereby said rabbles may be maintained in operative or ininoperative position.

- 8. In a rabble and clinker breaker, a car-Y riage, series of swingingrabbles on the carriage, a frame on the carriage and movable relativethereto, and means for propelling the carriage attached to the framewhereby said frame has an initial displacement relative to the carriage,said frame having means for engaging the series of rabbles whereby saidrabbles are swung substantially as and for the purpose set forth.

4. In a rabble and clinker breaker, acarriage, series of swingingrabbles on the carriage, a frame on the carriage having stopscontrolling the swinging movement of the rabbles, rollers interposedbetween the frame and the carriage,means limiting the rolling movementof the carriage on the fra1ne,and means for propelling the carriageconnected to the frame.

5. In a rabble and clinker breaker, a revoluble star wheel the adjacentspokes of which have tapered edges at right angles to one another.

FREDERICK WILLIAM BOOKING.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioner of Patents, Washington, 10.76.

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